On 06/06/2018 01:43 AM, Paul Whalen wrote:

Hi Zamir,

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Oh by the way, I am using Fedora-Minimal-armhfp-28-1.1-sda.raw.xz

On 06/06/2018 12:13 AM, Zamir SUN wrote:

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Hi,

I have two questions about BeagleBone Black.

1. Is there anyway to make it boot when plug into power adapter? By this

I mean, without the matter of push the power button.

2. I see by console=ttyO0 cannot get the log printed onto serial now.

Although I know console=tty0 can still make the logs printed to a screen, but showing on the serial is always easier for debug. So is there anywhere I can check the new console name?

The console was moved to ttyS0, but should still show output on ttyO0. I still use ttyO0 and get a warning during the boot:

[ 0.004075] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'

I do use an RS232 cape for my serial console[1], so perhaps it differs. Can anyone else confirm?

Hi Paul,

Thanks for your info.

Well, I tried "console=ttyO0" and it do not work yesterday. While just now I switched to "console=ttyO0,115200n8" and it works all of a sudden, not sure why. So at last my working kernel commandline looks like

ro root=UUID=0dc43cd3-b7f5-47dc-8b74-5261d2dd7ded console=ttyO0,115200n8 console=tty0

By the way, I am using a cheap PL2303 serial, lsusb shows the following. Bus 002 Device 007: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port

By the way, I don't know what hack takes effect, but today my BBB can boot without push the button XD

Hope this is still useful for others.

Paul

[1] - https://www.logicsupply.com/cbb-ttl-232/

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Thanks!

-- Ziqian SUN (Zamir) GPG : 1D86 6D4A 49CE 4BBD 72CF FCF5 D856 6E11 F2A0 525E Want to know more about Fedora? Visit https://fedoraproject.org/wiki/ Ready to contribute? See https://whatcanidoforfedora.org/ _______________________________________________ arm mailing list -- arm@lists.fedoraproject.org To unsubscribe send an email to arm-leave@lists.fedoraproject.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@lists.fedoraproject.org/me...

On Fri, Jun 8, 2018 at 10:06 AM, Peter Robinson pbrobinson@gmail.com wrote:

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Hi,

I have two questions about BeagleBone Black.

1. Is there anyway to make it boot when plug into power adapter? By this

I mean, without the matter of push the power button.

2. I see by console=ttyO0 cannot get the log printed onto serial now.

Although I know console=tty0 can still make the logs printed to a screen, but showing on the serial is always easier for debug. So is there anywhere I can check the new console name?

The console was moved to ttyS0, but should still show output on ttyO0. I still use ttyO0 and get a warning during the boot:

[ 0.004075] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'

I do use an RS232 cape for my serial console[1], so perhaps it differs. Can anyone else confirm?

Hi Paul,

Thanks for your info.

Well, I tried "console=ttyO0" and it do not work yesterday. While just now I switched to "console=ttyO0,115200n8" and it works all of a sudden, not sure why. So at last my working kernel commandline looks like

ro root=UUID=0dc43cd3-b7f5-47dc-8b74-5261d2dd7ded console=ttyO0,115200n8 console=tty0

You need to specify speed for the serial port, you can now with F-28+ also use ttyS0, the ttyO0 is an alias for compatibility.

Thanks for the info.

...

By the way, I am using a cheap PL2303 serial, lsusb shows the following. Bus 002 Device 007: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port

By the way, I don't know what hack takes effect, but today my BBB can boot without push the button XD

I suspect it was powering on but the serial console negotiation was causing random data on the console during u-boot which interrupted the boot process. I've never had to press the power button on any of my beaglebones to make it start.

Oh well, I never think about this. Especially from the first day I have my BBB, I need to push the power button to make it start. But luckily I do not need to push it now.

Just FYI, I tested 4.17.0-1.fc29.armv7hl on BBB (as well as my other arm devices, but it is a different topic) and decided to close the ancient bug we filed before since I don't think we can install any popular desktop now. https://bugzilla.redhat.com/show_bug.cgi?id=1223618